Quick change expendable brush for dulling machines



E. F. HARACZ May 10, 1966 QUICK CHANGE EXPENDABLE BRUSH FOR DULLING MACHINES Filed Feb. 15, 1964 2 Sheets-Sheet l i i ii i rgg @m W. Q

INVENTOR. la wrdmlwc E. F. HA RACZ May 10, 1966 QUICK CHANGE EXPENDABLE BRUSH FOR DULLING MACHINES Filed Feb. 13, 1964 2 Sheets-Sheet 2 INVENTOR. I'd/161d if firac;

ilfiiwgys United States Patent ()1 3,249,958 QUICK CHANGE EXPENDABLE BRUSH FOR DULLING MACH[NES Edward F. Haracz, 161 Pershing Ave., Clifton, NJ. Filed Feb. 13, 1964, Ser. No. 344,716 8 Claims. (Cl. 15-77) This invention relates to dulling machines wherein one or more rotatable cylindrical brushes are caused to rub ing mechanism.

The present invention has for an object to provide improved means for positively coupling a removable and dispensable brush to the releasable driving means of a dulling machine of the above mentioned type, and in such manner that rotative slippage of the brush in operation is prevented, especially under heavy load.

The above stated and other objects will become apparent from a reading of the following description of illustrative embodiments of the present invention in connection with the accompanying drawings thereof, in which drawmgs:

FIG. 1 is a vertical cross-sectional view of a dulling machine equipped with a removable expendable brush and releasable driving means therefor, the brush and driving means having improved means according to this invention for positively coupling the former in driven relation to the latter so as to prevent rotative slippage of the brush during operation thereof.

FIG. 2 is a similar View showing the brush driving means released from coupled engagememnt with the brush, so that the latter can be quickly removed and replaced by a new brush when necessary.

FIG. 3 is a face view of the head of one of the arbors of the brush driving means from which the brush has been removed, said head being provided with male coupling clutch means adapted to be engaged by a brush core; FIG. 4 is an end view of a brush core showing female coupling clutch means adapted to cooperate with and engage the male coupling clutch means of the arbor head of FIG. 3. v

FIG. 5 is a fragmentary top plan view of an arbor head and its male coupling clutch means and the opposed brush core and its female coupling clutch means ready to be coupled to said arbor head.

FIG. 6 is a fragmentary elevational view of a brush core having a modified form of female coupling clutch means.

Like characters of reference are employed in the above described views of the brush mounting means of this invention to indicate corresponding parts thereof.

Referring to FIG. 1 more particularly, the reference character 10 indicates the housing of a dulling machine of known general or conventional construction, the same including respective front and rear walls 11 and 12. Said respective walls are pierced to provide vertical ways 13 and 14, through which extend respective arbors of the brush driving mechanism of the machine.

The brush driving mechanism comprises a head-stock connection with the front wall of the housing. The dullof the housing and a tailstock assembly 18 mounted in connection with the front wall of the housing. The dulling brush 19 is adapted to be mounted in con- Patented May 10, 1966 nection with and between the headstock and tailstock assemblies of the brush driving mechanism, so as to be disposed axially parallel .to and above a conventional anvil roller 20, for operational rubbing contact with material supported by the latter.

The headstock assembly 17 comprises a bearing member 21 which is vertically adjustable in the way 14 of the housing wall 12, by means of an adjusting screw 22 that is threaded through a bracket block 23 which is fixedly mounted on the housing wall 12, and has a swiveled connection with the bearing member 21. The arbor 24 of the headstock assembly is journaled in the bearing member 21, and is provided, on its outer end, with a driving gear 25, or. other equivalent means, adapted to be operated by the power transmission means (not shownlof the dulling machine. At its inner end, the arbor 24 terminates in a diametrically enlarged head 26, adapted to be operatively engaged with one end of the dulling brush 19. Detail brush coupling features of this head 26 will be hereinafter more particularly described.

The tailstock assembly also comprises a bearing member 27 that is vertically adjustable in the way 13 of the housing front wall 11, by means of an adjusting screw 28 which is threaded through a bracket block 29 that is fixedly mounted on the housing wall 11, and has a swiveled connection with said bearing member 27. The arbor 30 of the tailstock assembly is journaled in the bearing member 2'7, and is also slidably supported by the latter. At its inner end, the arbor 3t) terminates in a diametrically enlarged head 31 adapted to engage the opposite end of the dulling brush 19. Detail brush coupling features of this head 31 will also be hereinafter more particularly described. The arbor 30 is provided with an axial bore 32 for rotational and sliding movement of a draw-bolt 33 relative thereto.

The inner end of the draw-bolt 33 is screw threaded for detachable engagement with an internally screw-threaded anchoring bore 34 with which the arbor 24 of the headstock assembly is provided. At its outer end the drawbolt 33is provided with a clamping head 35 that is adapted to abut against the outer end of the arbor 30. This mounted in coupled connection to and between the heads' of the opposed arbors of the headstock and tailstock assemblies, said brush may be positioned in desired operative spaced relation to the anvil-roller 20, by vertically adjusting the respective bearing members 21 and Y27, so that desired rubbing pressure of the brush against the material supported by the anvil roller will be assured.

To aid in separating the heads 26 and 31 of the arbors 24and 30, when the draw-bolt 33 is turned out of and released from the anchoring bore 34 of the arbor 24, a hammer member 37 is suitably afiixed to the draw-bolt in normally spaced away relation to the head 31 or arbor 30. When the draw-bolt is released, so as to be capable of outward slidable withdrawal through the arbor 30 from the arbor 24, the hammer member 37 can be forcibly knocked against the head 31, thereby slidably moving said arbor 30 outwardly through the bearing member 27, thus axially retracting the head 31 relative to the head 26, and thereby freeing the brush 19 for displacement from its operative coupled relation to and between the arbor heads 26 and 31 (see FIG. 2).

The dulling brush 19 comprises an open ended tubular core 38, upon which are suitably afiixed the radially projecting brush bristles 39. In many cases it may be sufficient to frictionally engage the respective open ends of the brush core 38 with the heads 26 and 31 of the driving .anbors 24 and 30. However such frictional driving connection of the brush to the driving mechanism involves risk of rotative slippage of the brush during operation thereof. If such slippage occurs, it may well involve undesirable unequal wear of the brush, and resultant undesirable non-uniform rubbing effect thereof against the material treated. In view of this, it is desirable, in other cases, to provide means to positively couple the brush to the releasable driving means, so that, in operation, rotative slip-page of the .brush relative to the heads 26 and 3-1 of arbors 24 .and 30 is prevented, especially under heavy loads. object of the present invention, as above stated. In an illustrative means for such purpose as shown each head 26 and 31 of the arbors 24 and 30 is provided, at its rearward or outward side, with a radially projecting limiting or stop flange 40 against which an opposed end of the brush core 38 can be abutted when coupled to and between said heads. Suitably .afiixed by their rear ends in radial slots 41 with Which said flanges 40 are provided, as by riveting or welding, are keys 42 which extend over the body peripheries of the heads 2-6 and 31, to project radially outward from the brush core receiving and seating surfaces thereof (see FIGS. 1, 3 and These keys 42 provide male coupling clutch elements. The tubular core 38 of the brush may be produced from various inexpensive materials, such as aluminum or other thin metal, paper, plastic, or the like. Formed in the ends of the core 38, by swaging or other suitable forming procedure, are hollow spline groove members 43, arranged to project externally therefrom, the same being adapted to receive the aforesaid keys 42, when an opposed end of the core 38 is telescoped over the body of a head 26 or 31 of the arbors 24 or 30 (see FIGS. 1, 4 and 5). These spline groove members provide female coupling clutch elements.

The above described male and female coupling clutch elements, when mutually engaged, provide a positive interlocking connection between the dulling brush and driving means, therefor, which prevents rotative slippage of the brush relative to said driving means.

It will be understood that at least one pair of the mut u wally engageable male and female coupling clutch elements can be utilized, but it is preferable that .a plurality of circumferentially spaced pairs thereof be used, since such provision reduces pressure on any one pair thereof, and assures against deformation of the brush core.

If desired, the ends of the brush core may be outwardly flared, as shown, whereby to seat upon correspondingly tapered heads 26 or 31. Such arrangement is desirable when precision mounting of the brush is required.

A simplified form of female coupling clutch element is shown in FIG. 6, the same comprising slots 44 which indent the end portions of the brush core 38, and which receive the keys 42 of the male coupling clutch means when joining a brush core to an arbor head. This form of female coupling clutch means may be utilized with respect to brush cores which are made of materials that do not lend themselves to production of the hollow spline groove formations above described.

It will be understood that variations in the forms of the cooperating male and female coupling clutch elements may be made within the scope of the appended claims; the essential factor being that the same will firmly interlock, when mutually engaged, so as to prevent relative rotary movement between the brush core and the brush driving mechanism of the dulling machine.

I claim:

1. In a dulling machine of the type adapted to permit quick removal and replacement of an expendable dulling brush mounted between a pair of arbors journaled in The provision of means to this end is an bearings for rotary motion, the combination which comprises, a non-axially moveable first arbor, an axially moveable second arbor aligned with said first arbor in spaced apart relation thereto, a dulling brush having a tubular core, and means directly driving only said first arbor to impart rotary motion thereto, the inner ends of said arbors having radially enlarged heads adapted to enter and releasably engage the opposite open ends of said .brush core, each of said heads having elongated male coupling clutch means, and said brush core having elongated slot female coupling clutch means, said elongated male and female coupling clutch means being adapted to firmly interlock, with said brush core in direct engagement with said arbors, whereby said brush core is adapted to impart rotary motion to said second arbor without permitting rotative shifting movement of the brush relative to said arbor heads during brush operation.

2. A dulling machine according to claim 1, wherein the male coupling clutch means comprises at least one key affixed to a head to extend over the brush core engageable surface thereof in radial projection therefrom, and the female coupling clutch means comprises a spline opening formed in an end of the brush core to receive and embrace said key of a head.

3. A dulling machine according to claim ll, wherein the male coupling clutch means comprises a plurality of circumferentially spaced key-s affixed to each head to extend over the brush core engageable surfaces thereof in radial projection therefrom, and the female coupling clutch means comprising the provision at the open ends of the brush core of a corresponding plurality of circumferentially spaced hollow spline groove formations radially extending therefrom and adapted to receive and embrace the corresponding keys of said heads.

4. A dulling machine having side walls, a removable and expendable dulling brush having a tubular core, means releasably engageable with the open ends of the brush core comprising a non-axially movable headstock arbor mounted on one side wall of the machine and adapted to be power driven, and an axially moveable tailstock arbor mounted on the other side wall of the machine in spaced apart relation to said headstock arbor, the inner ends of said arbors having radially enlarged heads adapted to enter open ends of the brush core when said open ends are telescoped thereover, normally stationary draw bar means to retain said heads in supporting relation to the brush core by releasably connecting said tailstock arbor to said headstock arbor in withdrawable relation to the latter, each of said heads having elongated male coupling clutch means, and said brush core having elongated slot female coupling clutch means, said elongated male and female coupling clutch means being adapted to firmly interlock, with said brush core in direct engagement with said arbors, whereby said brush core is adapted to impart rotary motion to said tailstock arbor without permitting rotative shifting movement of the brush relative to the arbor heads during brush operation, thus preventing loosening of said draw bar means.

5. A dulling machine according to claim 4, wherein the male coupling clutch means comprises at least one key afiixed to each head to extend over the brush core engageable surface thereof in radial projection therefrom, and the female coupling clutch means comprises a spline opening in. each end of the brush core to receive and embrace said keys of the respective heads.

6. A dulling machine according to claim 4, wherein the male coupling clutch means comprises a plurality of circumferentially spaced keys afiixed to each head to extend over the brush core engageable surfaces thereof in radial projection therefrom, and the female coupling clutch means comprising the provision at respective open ends of the brush core of a corresponding plurality of circumferentially spaced hollow spline groove formations radially extending therefrom and adapted to receive and embrace the corresponding keys of said heads.

7. An expendable dulling brush adapted to be quickly removed and replaced in a dulling machine of the type which releasably engages a tubular dulling brush between a non-axially moveable first driving arbor and an axially moveable second driven arbor, and in which a dulling brush alone transmits rotary motion from the first driving arbor to the second driven arbor, said brush comprising, an open ended thin walled core having radially projecting bristles fixed thereto, a plurality of elongated hollow spline groove members extending axially inwardly from each open end of said core constituting female coupling clutch means, said female coupling clutch means being adapted to receive and firmly interlock with male coupling clutch means on the arbors of .a dulling machine, whereby said brush is adapted to prevent rotative slippage of the brush relative to the arbors of a dulling machine in which said brush is mounted.

8. An expendable dulling brush adapted to be quickly removed and replaced in a dulling machine of the type which releasably engages a tubular dulling brush between a non-axially movable first driving arbor and an axially movable second driven arbor, and in which the dulling brush alone transmits rotary motion from the first driving arbor to the second driven arbor, said brush comprising,

bors of a dull-ing machine in which said .brush is mounted.

References Cited by the Examiner UNITED STATES PATENTS 1,482,744 2/1924 Heifernan 15-179 2,879,534 3/1959 Swanson et a1. 15-179 2,885,705 5/1959 Malone 15179 2,907,063 10/1959 Jones 15-1 82 3,120,018 2/1964 Lanstrom 15-179 3,142,079 7/1964 Haracz 15-77 CHARLES A. WILLMUTH, Primary Examiner. EDWARD L. ROBERTS, Assistant Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3, 249, 958 May 10, 1966 Edward Fo Haracz It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 1, line 40, for "engagememnt" read r engagement column 1, lines 67 to 70, for "The brush driving mechanism comprises a head-stock connection with the front wall of the housing. The dullof the housing and a tailstock assembly 18 mounted in connection with the front wall of the housing, The" read The brush driving mechanism comprises a head-stock assembly 17 mounted in connection with the rear wall 12 of the housing, and a tailstock assembly 18 mounted in connection with the front wall of the housing. The -O Signed and sealed this 22nd day of August 1967:,

(SEAL) Attest:

ERNEST W. SWIDER EDWARD J BRENNER Attesting Officer Commissioner of Patents 

1. IN A DULLING MACHINE OF THE TYPE ADAPTED TO PERMIT QUICK REMOVAL AND REPLACEMENT OF AN EXPENDABLE DULLING BRUSH MOUNTED BETWEEN A PAIR OF ARBORS JOURNALED IN BEARINGS FOR ROTARY MOTION, THE COMBINATION WHICH COMPRISES, A NON-AXIALLY MOVEABLE FIRST ARBOR, AN AXIALLY MOVEABLE SECOND ARBOR ALIGNED WITH SAID FIRST ARBOR IN SPACED APART RELATION THERETO, A DULLING BRUSH HAVING A TUBULAR CORE, AND MEANS DIRECTLY DRIVING ONLY SAID FIRST ARBOR TO IMPART ROTARY MOTION THERETO, THE INNER ENDS OF SAID ARBORS HAVING RADIALLY ENLARGED HEADS ADAPTED TO ENTER AND RELEASABLY ENGAGE THE OPPOSITE OPEN ENDS OF SAID BRUSH CORE, EACH OF SAID HEADS HAVING ELONGATED MALE COUPLING CLUTCH MEANS, AND SAID BRUSH CORE HAVING ELONGATED SLOT FEMALE COUPLING CLUTCH MEANS, SAID ELONGATED MALE AND FEMALE COUPLING CLUTCH MEANS BEING ADAPTED TO FIRMLY INTERLOCK, WITH SAID BRUSH CORE IN DIRECT ENGAGEMENT WITH SAID ARBORS, WHEREBY SAID BRUSH CORE IS ADAPTED TO IMPART ROTARY MOTION TO SAID SECOND ARBOR WITHOUT PERMITTING ROTATIVE SHIFTING MOVEMENT OF THE BRUSH RELATIVE TO SAID ARBOR HEADS DURING BRUSH OPERATION. 